Real-time monitoring and alarming method for cell pressure change of short circuit port of aluminum electrolysis cell

Abstract

The invention relates to the field of aluminum electrolysis cell monitoring, and provides an aluminum electrolysis cell short circuit port cell voltage change real-time monitoring and alarming method, which comprises the following steps of: 1, transmitting a switching value signal output by a voltage collector in an electrolysis workshop to a core intelligent telecontrol communication control management machine; 2, monitoring the voltage of the grouped cells and the voltage of the single cells in the group in real time, and performing double-fusion judgment by adopting data of a power supply system and an aluminum electrolysis cell control system; step 3, when the voltage of a certain group tank and the voltage of a certain single tank in the group are simultaneously subjected to over-limit output, performing remote alarm in real time; and step 4, sending a load cut-off execution signal to a rectification station integrated self-protection system, and carrying out emergency power failure on the power branch plant. Data double-fusion judgment of a power supply system and an aluminum electrolysis cell control system is adopted, and the purposes of automatic real-time capture, accurate judgment and timely processing of the abnormal state of the aluminum electrolysis short circuit port are achieved.

Description

Technical Field

[0001] The invention relates to the field of aluminum electrolysis cell monitoring, and in particular to a method for real-time monitoring and alarming of cell pressure changes at a short-circuit port of an aluminum electrolysis cell. Background Art

[0002] Aluminum electrolytic cells are usually connected in series power supply. The short-circuit of the electrolytic cell is the key and important part of the safe production of electrolysis. Once any of the electrolytic cells short-circuit, ignition, explosion or circuit breakage occurs, the energy generated by the instantaneous voltage and current will destroy the circuit bus in severe cases, causing the entire electrolysis to stop production, bringing huge safety hazards and economic losses.

[0003] Traditional manual prevention, early warning and emergency response measures and the voltage-raising time and voltage protection of the cell control machine can no longer fully guarantee the safety of the existing modern large-scale aluminum electrolysis production process. Therefore, a real-time monitoring and alarm method for the short-circuit cell voltage change of the aluminum electrolysis cell is needed. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a real-time monitoring and alarm method for the short-circuit voltage changes of an aluminum electrolysis cell, which solves the problem that traditional manual prevention, early warning and emergency response measures and the voltage-raising time and voltage protection of the cell control machine are no longer able to fully guarantee the safety of the existing modern large-scale aluminum electrolysis production process.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolysis cell comprises the following steps:

[0007] Step 1: Transmit the switch signal output by the voltage collector in the electrolysis workshop to the core intelligent telecontrol communication control management machine;

[0008] Step 2: Monitor the group cell voltage and the single cell voltage in the group in real time, and use the dual fusion evaluation of the power supply system and the aluminum electrolytic cell control system data;

[0009] Step 3: When the voltage of a certain group slot and the voltage of a single slot in the group are both out of limit, a remote alarm is issued in real time;

[0010] Step 4: Send a load cut-off execution signal to the rectifier integrated self-protection system to perform an emergency power cut-off on the power plant;

[0011] Step 5: After the power outage is completed, locate the fault point immediately, generate a record report, collect the key processing information in steps 3 and 4, and record it for future reference.

[0012] Preferably, the voltage collector in step one includes a single-slot voltage collector and a group voltage collector.

[0013] Preferably, the rectifier station comprehensive self-protection system in step four is used to protect the rectifier station. The rectifier station adopts a centralized automatic evaluation and early warning controller, and performs automatic multi-condition integrated evaluation and automatic graded early warning prompts to realize automatic graded intervention in the comprehensive self-protection system to achieve linked load reduction.

[0014] Preferably, the switching signal transmission method in step 1 is selected to be transmitted through an independent optical fiber network.

[0015] Preferably, in step 1, the management machine has a logic programmable function, and calculates the real-time parameters of the system through internally compiled special algorithm evaluation software.

[0016] Preferably, the specific method of performing real-time remote alarm in step three is: generating a signal through a core intelligent telecontrol communication control management machine, transmitting one of the signals to the integrated automation system, and realizing remote alarm in the background system.

[0017] Preferably, the specific method of emergency power off in step four is: another signal generated by the core intelligent remote communication control management machine transmits the signal to the emergency stop control circuit through the heavy-duty device, and sends a load cut-off execution signal to the rectifier integrated self-protection system to complete the emergency power off of the power plant.

[0018] Preferably, in step five, the generated record report contains voltage acquisition information and alarm information, and generates a curve chart and a report.

[0019] Preferably, the voltage information is collected using the GOOSE transmission protocol.

[0020] Preferably, the key production data of the electrolytic cell control system in step one and the rectifier integrated self-protection system in step four are transmitted in real time at the millisecond level over the entire domain.

[0021] The present invention provides a method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolytic cell.

[0022] Beneficial effects:

[0023] 1. The present invention adopts dual fusion evaluation of power supply system and aluminum electrolytic cell control system data to achieve the goal of automatic real-time capture, accurate evaluation and timely treatment of abnormal status of aluminum electrolytic short-circuit. It will make up for the blind spots of traditional manual inspections, realize real-time and high-speed monitoring of electrolytic cell pressure changes, cell pressure line breakage, anode slippage and other early warnings in the full time domain, timely and accurate automatic evaluation and interlocking protection treatment at the early stage of overpressure accidents at busbar column short-circuit, and timely record key treatment data information, striving to eliminate overpressure accidents at aluminum electrolytic short-circuit in the early stage.

[0024] 2. The present invention uses a photoelectric conversion module to effectively solve the problems of dispersed electrolytic cell locations, long transmission distances, and large interference. The criterion sampling adopts an independent 2-source + independent 2-channel + dual-system simultaneous online continuous collection and comparison method, and fully screens the characteristic relationship between the fluctuation characteristics of parameters such as the full series of single-cell voltage, series voltage, series current, and the collected voltage as a reference criterion. The evaluation logic adopts single-cell and multi-cell accumulation supplemented by the cell control system cell pressure 2+1 complementary mode for comparison and evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a flow chart of a method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolysis cell according to one or more embodiments. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example:

[0028] like Figure 1 As shown, an embodiment of the present invention provides a method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolysis cell, comprising the following steps:

[0029] Step 1: The switch signals output by the single tank voltage collector and the group voltage collector in the electrolysis workshop are transmitted to the core intelligent telecontrol communication control management machine through an independent optical fiber network. The management machine has a logic programmable function and calculates the real-time parameters of the system through the internally compiled special algorithm evaluation software;

[0030] Step 2: Monitor the group cell voltage and the single cell voltage in the group in real time, and use the dual fusion evaluation of the power supply system and the aluminum electrolytic cell control system data;

[0031] Step 3: When the voltage of a certain group slot and the voltage of a single slot in the group exceed the output limit at the same time, a signal is generated through the core intelligent remote communication control management machine, and one of the signals is transmitted to the integrated automation system to realize real-time remote alarm in the background system.

[0032] Step 4: Send a load-cutting execution signal to the rectifier integrated self-protection system. Another signal generated by the core intelligent telecontrol communication control management machine transmits the signal to the emergency stop control circuit through the heavy-duty device, and sends a load-cutting execution signal to the rectifier integrated self-protection system to complete the emergency power outage of the power plant. The rectifier integrated self-protection system is used to protect the rectifier. The rectifier adopts a centralized automatic evaluation and early warning controller, and performs automatic multi-condition integrated evaluation and automatic graded early warning prompts to realize automatic graded intervention in the integrated self-system to achieve linked load reduction;

[0033] Step 5. After the power outage is completed, the fault point is immediately located and a record report is generated. The key processing information in steps 3 and 4 is collected and recorded for future reference. The generated record report contains voltage collection information and alarm information, and generates curve graphs and reports. The voltage information is collected using the GOOSE transmission protocol to replace the traditional communication gateway data polling collection, which is safer, more reliable and time-saving.

[0034] Among them, the key production data of the electrolytic cell control system in step one and the rectifier station comprehensive self-protection system in step four are transmitted in real time at the millisecond level across the entire area.

[0035] This method uses a photoelectric conversion module to effectively solve the problems of dispersed electrolytic cell locations, long transmission distances, and large interference. The criterion sampling adopts independent 2 sources + independent 2 channels + dual systems for simultaneous online continuous collection and comparison, fully screening the full series of single-cell voltage, series voltage, series current and other parameter fluctuation characteristics and the characteristic relationship between the collected voltage as a reference criterion. The judgment logic adopts single-cell and multi-cell accumulation supplemented by the cell control system cell pressure 2+1 complementary mode for comparative judgment.

[0036] The dual fusion evaluation of the power supply system and the aluminum electrolytic cell control system data can achieve the goal of automatic real-time capture, accurate evaluation, and timely processing of abnormal conditions at the aluminum electrolytic short-circuit junction. It will make up for the blind spots of traditional manual inspections, realize real-time and high-speed monitoring of the changes in the cell pressure, the breakage of the cell pressure line, the decline of the anode, and other early warnings, and timely and accurately automatically evaluate and chain protection at the early stage of the overpressure accident at the busbar column short-circuit junction, and can record key disposal data information in a timely manner, striving to eliminate the overpressure accident at the aluminum electrolytic short-circuit junction in the early stage.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolysis cell, characterized in that: The following steps are involved: Step 1: Transmit the switch signal output by the voltage collector in the electrolysis workshop to the core intelligent telecontrol communication control management machine; Step 2: Monitor the group cell voltage and the single cell voltage in the group in real time, and use the dual fusion evaluation of the power supply system and the aluminum electrolytic cell control system data; Step 3: When the voltage of a certain group slot and the voltage of a single slot in the group are both out of limit, a remote alarm is issued in real time; Step 4: Send a load cut-off execution signal to the rectifier integrated self-protection system to perform an emergency power cut-off on the power plant; Step 5: After the power outage is completed, locate the fault point immediately, generate a record report, collect the key processing information in steps 3 and 4, and record it for future reference.

2. A method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolysis cell according to claim 1, characterized in that: The voltage collector in step 1 includes a single-slot voltage collector and a group voltage collector.

3. The method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolysis cell according to claim 1, characterized in that: The rectifier station comprehensive self-protection system in step 4 is used to protect the rectifier station. The rectifier station adopts a centralized automatic evaluation and early warning controller, and performs automatic multi-condition integrated evaluation and automatic graded early warning prompts to achieve automatic graded intervention in the comprehensive self-protection system to achieve linked load reduction.

4. A method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolysis cell according to claim 1, characterized in that: In the step 1, the switching signal is transmitted through an independent optical fiber network.

5. The method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolysis cell according to claim 1, characterized in that: In the step 1, the management machine has a logic programmable function and calculates the real-time parameters of the system through the dedicated algorithm evaluation software compiled internally.

6. A method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolysis cell according to claim 1, characterized in that: The specific method of real-time remote alarm in step three is: generate a signal through the core intelligent telecontrol communication control management machine, transmit one of the signals to the integrated automation system, and realize remote alarm in the background system.

7. A method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolysis cell according to claim 6, characterized in that: The specific method of emergency power off in step four is: another signal generated by the core intelligent remote communication control management machine transmits the signal to the emergency stop control circuit through the heavy-duty device, and sends a load cut-off execution signal to the rectifier comprehensive self-protection system to complete the emergency power off of the power plant.

8. A method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolysis cell according to claim 1, characterized in that: In the step 5, the generated record report contains voltage acquisition information and alarm information, and generates a curve chart and a report.

9. A method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolysis cell according to claim 8, characterized in that: The voltage information is collected using the GOOSE transmission protocol.

10. A method for real-time monitoring and alarming of short-circuit voltage changes in an aluminum electrolysis cell according to claim 1, characterized in that: The key production data of the electrolytic cell control system in step one and the rectifier integrated self-protection system in step four are transmitted in real time at the millisecond level across the entire domain.

Images